New to forum - Electric question

[Bibbyman]

You got good advice from Sparks and Phoenix on sizing the phase converter.  Ratings are always a bit ambiguous when it comes to motors and roto phase converters.

I said if I were to do it over again, I’d gone bigger for expansion purposes.   We went with a 50hp Ronk and now have more machines adding up to more horse power than the phase converter is rated at - thus we can’t run everything at one time and there is no more reasonable way to add more machines without upgrading the phase converter or putting in another.

[logwalker]

Hey Bib, just how many of you are there? Did you put those grand kids to work?

On a more serious note, how many amps do you feed that Ronk?

Joe

[Bibbyman]

I have no way of knowing.  The electrician that installed it did some testing to see if the "legs" were balanced.  I think it (that would be the 25hp WM mill motor) was pulling something in the area of low 80's.  I think it's fused to 115 amps. 

Then again, I could be all wrong.  I’m relying on old memory.   

[logwalker]

Just look at the breaker feeding it. I am feeding my 20 hp with a 100 amp breaker. Those big breakers start getting expensive. I found a used 3 phase breaker panel on ebay and the same with the breakers. Saves me a ton of clams.

Joe